There's a catch. She was born without three of her right fingers, which is a rare birth defect called Poland Syndrome. With a little help from a 3D printed hand, Hailey went on baseball's biggest stage and threw that curve ball!

She can now cross the Houston Astros off her list of ballparks, along with the Washington Nationals and Baltimore Orioles!

"Everytime she gets noticed or recognized because of her hand, it helps other people," Hailey's mom said.

The Texas Rangers want in on it too. Chuck Morgan, the voice of the Rangers, tweeted back in September:

Hailey is welcome at Globe Life Park any time. i look forward to introducing her for a Ceremonial First Pitch at a Texas Rangers game.